Ingonish Beach
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Ingonish Beach clear sky chart from 2005-11-05 to 2017-12-01.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.
Observation TypeMinimum conditions for hour to be usableOut of hours
Clear of CloudsTransparencySeeingSky Brightness
Planetary:50%(no limit)Average(no limit)Nighttime Hours
Deep Sky:70%Average(no limit)5.9Nighttime Hours
CCD Imaging:70%Below AveragePoor(no limit)Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

PlanetaryData
Pts
Deep Sky
Max 60%
Data
Pts
Both Planetary and Deep Sky
Max 60%
Data
Pts
Either Planetary or Deep SkyData
Pts
CCD ImagingData
Pts
Night
27%
15533
8%
47795
4%
15490
31%
15490
12%
37475

By Month

MonthDays of MonthPlanetaryData
Pts
Deep Sky
Max 60%
Data
Pts
Both Planetary and Deep Sky
Max 60%
Data
Pts
Either Planetary or Deep SkyData
Pts
CCD ImagingData
Pts
January1st to 15thNight
11%
749
3%
2506
1%
746
14%
746
4%
2184
January16th to endNight
12%
799
5%
2682
1%
799
16%
799
4%
2311
February1st to 15thNight
17%
703
5%
2286
1%
701
21%
701
7%
1877
February16th to endNight
20%
631
7%
1952
2%
631
25%
631
8%
1556
March1st to 15thNight
22%
718
11%
2119
5%
718
29%
718
13%
1653
March16th to endNight
24%
678
11%
2022
5%
678
31%
678
13%
1547
April1st to 15thNight
27%
539
11%
1796
8%
539
34%
539
14%
1308
April16th to endNight
30%
540
14%
1672
9%
540
36%
540
17%
1191
May1st to 15thNight
37%
540
12%
1440
6%
540
40%
540
19%
1065
May16th to endNight
37%
561
11%
1496
4%
560
41%
560
21%
1096
June1st to 15thNight
31%
540
5%
1440
2%
540
33%
540
14%
1153
June16th to endNight
40%
540
7%
1440
4%
540
42%
540
20%
1063
July1st to 15thNight
55%
510
8%
1360
5%
510
56%
510
27%
922
July16th to endNight
49%
565
9%
1419
5%
532
49%
532
19%
1062
August1st to 15thNight
48%
539
11%
1465
7%
535
50%
535
21%
1060
August16th to endNight
50%
573
13%
1862
11%
573
54%
573
21%
1246
September1st to 15thNight
39%
540
12%
1800
9%
540
45%
540
19%
1233
September16th to endNight
37%
565
17%
1954
14%
565
43%
565
18%
1296
October1st to 15thNight
31%
720
12%
2160
6%
720
36%
720
17%
1576
October16th to endNight
20%
799
9%
2427
4%
799
24%
799
11%
1940
November1st to 15thNight
21%
805
7%
2548
4%
805
23%
805
9%
2074
November16th to endNight
16%
825
5%
2730
2%
825
19%
825
6%
2326
December1st to 15thNight
12%
754
3%
2531
1%
754
15%
754
3%
2257
December16th to endNight
10%
800
1%
2688
0%
800
12%
800
2%
2479

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

Occurrence of each ForecastData
Points
Cloud CoverDay
17%9%48%6%35%5%5%7%25%
48638
Night
17%8%37%6%35%5%6%7%26%
47966
TransparencyDay
56%9%13%14%5%
48327
Night
57%10%12%14%5%
47795
SeeingDay
23%11%27%24%10%1
8051
Night
24%13%28%24%8%1
15537

By Month

Percentage Cloud Cover NE (2006-)
Color Meanings:
Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
12%9%5%11%9%48%7%7%5%19%
1432
16th to endDay
12%8%6%11%11%5%8%7%6%7%14%
1539
February1st to 15thDay
10%12%413%10%6%7%6%6%5%15%
1575
16th to endDay
8%13%6%10%7%46%5%5%5%24%
1521
March1st to 15thDay
9%11%6%7%8%46%5%5%8%24%
1829
16th to endDay
13%12%5%8%7%47%45%5%24%
2202
April1st to 15thDay
16%9%47%7%35%6%5%6%27%
2153
16th to endDay
21%10%36%5%23346%30%
2284
May1st to 15thDay
22%9%36%5%35%45%7%28%
2512
16th to endDay
17%8%37%6%36%5%6%7%28%
2618
June1st to 15thDay
25%7%36%5%345%5%7%23%
2520
16th to endDay
19%8%37%5%345%5%6%29%
2520
July1st to 15thDay
13%5%25%5%35%5%6%10%34%
2520
16th to endDay
18%6%37%6%36%5%6%9%26%
2653
August1st to 15thDay
22%6%26%5%45%5%6%8%28%
2481
16th to endDay
16%7%26%5%346%5%7%32%
2339
September1st to 15thDay
18%7%36%5%2446%7%33%
2160
16th to endDay
17%6%26%5%245%6%8%34%
2005
October1st to 15thDay
17%9%36%5%35%46%8%30%
1800
16th to endDay
21%12%48%6%45%45%419%
1797
November1st to 15thDay
20%15%5%9%7%44435%19%
1639
16th to endDay
15%14%7%8%8%5%6%5%5%6%15%
1560
December1st to 15thDay
19%12%6%12%7%6%7%5%5%5%9%
1443
16th to endDay
18%13%8%10%10%46%46%5%9%
1536
January1st to 15thNight
12%10%410%9%5%8%6%6%7%17%
2506
16th to endNight
14%8%5%9%8%48%8%7%9%16%
2682
February1st to 15thNight
14%8%410%7%47%6%7%8%19%
2285
16th to endNight
10%12%5%7%8%46%6%6%7%24%
1952
March1st to 15thNight
13%11%36%7%36%6%5%6%28%
2106
16th to endNight
14%11%48%6%35%446%30%
2022
April1st to 15thNight
19%9%26%6%245%5%7%30%
1796
16th to endNight
22%8%345%25%345%34%
1672
May1st to 15thNight
22%7%3442435%7%33%
1440
16th to endNight
16%7%25%5%245%7%9%33%
1494
June1st to 15thNight
26%8%25%5%25%46%5%26%
1440
16th to endNight
22%6%25%425%45%7%33%
1440
July1st to 15thNight
13%5%25%5%345%5%8%39%
1440
16th to endNight
19%6%244346%8%8%30%
1515
August1st to 15thNight
18%6%24425%6%6%8%34%
1476
16th to endNight
14%5%244345%5%8%40%
1862
September1st to 15thNight
17%5%245%3346%8%39%
1800
16th to endNight
16%5%25%4345%5%6%39%
1954
October1st to 15thNight
17%6%25%5%45%5%5%8%32%
2160
16th to endNight
22%7%35%6%35%5%6%7%24%
2427
November1st to 15thNight
19%10%36%6%45%5%6%7%21%
2548
16th to endNight
17%11%48%8%46%5%6%7%19%
2730
December1st to 15thNight
18%11%6%10%7%47%6%6%7%12%
2531
16th to endNight
20%12%7%9%7%47%5%6%6%11%
2688

Transparency (when cloud cover <= 30%)
Color Meanings:
Too cloudy to forecast Poor Below Average Average Above average Transparent
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
66%11%11%8%2
1433
16th to endDay
70%11%9%7%1
1539
February1st to 15thDay
67%11%10%8%1
1578
16th to endDay
57%10%14%11%5%
1521
March1st to 15thDay
55%10%11%15%6%
1839
16th to endDay
58%9%11%13%5%
2202
April1st to 15thDay
53%8%12%14%9%1
2153
16th to endDay
53%7%12%15%9%1
2284
May1st to 15thDay
55%7%12%16%6%
2512
16th to endDay
52%9%15%16%5%
2622
June1st to 15thDay
59%8%11%14%5%
2520
16th to endDay
54%10%11%15%8%
2520
July1st to 15thDay
40%10%19%21%7%
2372
16th to endDay
50%10%17%14%6%
2486
August1st to 15thDay
51%9%15%17%5%
2467
16th to endDay
45%12%16%20%4
2339
September1st to 15thDay
47%8%15%20%6%
2160
16th to endDay
44%10%15%19%9%
2005
October1st to 15thDay
51%10%13%16%8%
1800
16th to endDay
66%7%11%12%3
1797
November1st to 15thDay
67%7%11%10%2
1639
16th to endDay
66%12%11%8%1
1560
December1st to 15thDay
76%12%6%4
1443
16th to endDay
78%9%5%41
1536
January1st to 15thNight
68%13%9%6%1
2506
16th to endNight
67%12%9%7%1
2682
February1st to 15thNight
63%10%12%10%2
2286
16th to endNight
58%11%12%11%5%
1952
March1st to 15thNight
56%10%11%14%6%
2119
16th to endNight
55%8%11%15%7%1
2022
April1st to 15thNight
53%7%9%16%11%1
1796
16th to endNight
50%6%10%15%14%1
1672
May1st to 15thNight
51%7%11%19%8%1
1440
16th to endNight
46%10%14%20%7%
1496
June1st to 15thNight
60%7%11%16%4
1440
16th to endNight
49%9%14%15%10%
1440
July1st to 15thNight
40%8%17%24%8%
1360
16th to endNight
48%10%15%18%5%1
1419
August1st to 15thNight
46%9%16%20%6%
1465
16th to endNight
41%10%18%23%6%
1862
September1st to 15thNight
43%11%14%22%8%
1800
16th to endNight
42%10%14%23%8%
1954
October1st to 15thNight
48%10%15%18%7%
2160
16th to endNight
60%9%11%14%3
2427
November1st to 15thNight
60%11%12%11%3
2548
16th to endNight
65%13%11%7%2
2730
December1st to 15thNight
72%12%9%5%
2531
16th to endNight
77%11%6%31
2688

Seeing (when cloud cover <= 80%)
Color Meanings:
Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
MonthDays in MonthOccurrence of each ForecastData
Points
January1st to 15thDay
16%25%35%19%3
240
16th to endDay
18%25%35%15%3
256
February1st to 15thDay
19%19%40%16%3
236
16th to endDay
18%19%31%23%6%
212
March1st to 15thDay
14%20%34%19%10%1
247
16th to endDay
23%20%27%19%7%3
288
April1st to 15thDay
27%12%32%17%8%1
270
16th to endDay
27%9%28%23%9%
333
May1st to 15thDay
32%7%21%23%11%4
468
16th to endDay
21%9%26%28%11%2
519
June1st to 15thDay
30%6%27%25%8%1
495
16th to endDay
23%325%31%13%2
495
July1st to 15thDay
16%221%40%16%2
475
16th to endDay
25%221%33%15%1
514
August1st to 15thDay
20%220%34%18%2
454
16th to endDay
18%5%23%36%13%3
332
September1st to 15thDay
23%8%30%29%7%1
315
16th to endDay
20%8%33%24%11%1
282
October1st to 15thDay
21%11%30%21%12%1
270
16th to endDay
28%19%30%13%6%
288
November1st to 15thDay
28%18%24%18%6%2
280
16th to endDay
25%23%28%17%4
285
December1st to 15thDay
33%24%28%11%2
241
16th to endDay
28%26%28%12%21
256
January1st to 15thNight
20%26%33%17%2
750
16th to endNight
20%25%35%13%4
799
February1st to 15thNight
22%18%34%21%3
704
16th to endNight
19%18%30%23%7%
631
March1st to 15thNight
19%15%34%24%5%
720
16th to endNight
24%15%28%21%7%1
678
April1st to 15thNight
25%12%27%25%7%
539
16th to endNight
27%10%27%23%10%
540
May1st to 15thNight
28%5%21%24%15%4
540
16th to endNight
21%7%26%29%12%1
561
June1st to 15thNight
27%6%25%30%8%1
540
16th to endNight
26%322%33%11%2
540
July1st to 15thNight
16%218%42%18%1
510
16th to endNight
23%318%35%18%
565
August1st to 15thNight
23%19%34%18%2
539
16th to endNight
19%220%38%16%2
573
September1st to 15thNight
20%6%29%30%11%1
540
16th to endNight
21%10%26%29%10%
565
October1st to 15thNight
23%11%29%24%10%1
720
16th to endNight
30%15%30%18%4
799
November1st to 15thNight
26%18%28%19%5%1
805
16th to endNight
27%20%31%15%5%
825
December1st to 15thNight
29%25%29%11%4
754
16th to endNight
29%24%28%13%31
800
Page generated at 2017-12-02 10:14:25. Version ac04

Copyright 2017 A. Danko


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